Search banners
Add commercial context to the right search time.
A banner should support the search intent, not take over the results page.
Query relevance
Show banners only to terms or categories where the message fits content.
Limit height and frequency
Make products remain visible and avoid repeating the same message.
Campaign period
Use fixed start and end dates.
Measure separately
Follow banner impressions, clicks and downstream conversion alongside normal product clicks.
Mobile
Check that banners do not take most of the first viewport.